Article
Materials Science, Ceramics
Koji Kuraoka, Ryoga Yamamoto
Summary: Polyacrylamide (PAAm)-silica organic-inorganic hybrid membranes were prepared for carbon dioxide (CO2) separation. The membranes showed high ideal separation factor for CO2/N-2 at 298 K, and also exhibited high CO2 selectivity in a gas mixture of 50%CO2-50%N-2.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Patrick A. Bonnaud, Fouad Oulebsir, Guillaume Galliero, Romain Vermorel
Summary: This study investigates the adsorption and diffusion of methane and carbon dioxide mixtures in mature type-2 kerogen using molecular dynamics simulations. The results show that the adsorption selectivity of CO2/CH4 decreases with temperature and a corrected Extended Langmuir (CEL) model is proposed to improve the estimations. The study also finds that the CEL model can describe the contribution of adsorption to selectivity under flow conditions.
Article
Chemistry, Physical
Xiangshuai Meng, Timing Fang, Guohui Zhou, Shujin Liu, Xiaomin Liu
Summary: The influence of the intramembrane structure of SILMs on gas separation was demonstrated by molecular dynamics simulations. The five morphological characteristics of separation membranes have different separation effects. Interfacial characteristics significantly affect selectivity during the selection process, while the difference in blocking effect on CO2 is key to the separation. The distribution characteristics of ionic liquids affect the residence time and penetration of gas molecules in membranes during the permeation process.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Fuqiang Chen, Jiawei Wang, Lidong Guo, Xinlei Huang, Zhiguo Zhang, Qiwei Yang, Yiwen Yang, Qilong Ren, Zongbi Bao
Summary: This study reports a gallate-based metal-organic framework adsorbent with high CO2 adsorption uptake and selectivity. The adsorbent shows excellent performance in separating flue gas and natural gas, and exhibits robust structure and stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Thermodynamics
Wenjun Zhou, Weixing Zhou, Huayu Qiu, Dun Li, Yu Zhang, Muhammad Sajjad Ahmad, Kawi Sibudjing
Summary: This study investigates the performance of a Ni-coated MoS2 membrane in the methane pyrolysis process. The membrane demonstrates excellent catalytic and separation performance due to its increased specific surface area and reduced pore size. The Ni coating attracts methane, destabilizes the C-H bond, and promotes methane deep crack, while the MoS2 membrane blocks methane and drives H proton transportation for H2 formation. This work provides guidance for bifunctional membranes in methane pyrolysis, with potential to reduce energy cost and greenhouse gas emissions.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Chemistry, Multidisciplinary
Rupam Sahoo, Supriya Mondal, Debolina Mukherjee, Madhab C. Das
Summary: Efforts have been made to separate CO2 from flue gas and biogas using nonthermal-based separations, such as adsorption-based or membrane-separation technology employing metal-organic frameworks (MOFs). This review summarizes the strategies, performance parameters, and molecular-level mechanisms of such separations, and offers critical insights and future recommendations for further development of MOF materials as flue and biogas separators.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Thermodynamics
Timing Fang, Chunlei Wei, Xiangshuai Meng, Guohui Zhou, Xiaomin Liu
Summary: The behavioral processes of gas separation and transfer in homogeneous and biphasic cellulose/ionic liquid membranes have been studied using molecular dynamics simulations. Structural homogeneity is the main criterion for separation. It is revealed that solvent homogeneity affects gas separation at the molecular level, which may enhance the creation and design of two-dimensional materials in the future.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Materials Science, Characterization & Testing
Atousa Tayebi, Ali Kargari, Somaye Akbari
Summary: This study fabricated novel dense membranes by blending Pebax with PAMAM and evaluated their application in CO2/CH4 gas separation. The results showed that PAMAM loading, operating pressure, and temperature significantly affected gas permeability and CO2/CH4 selectivity. Gas permeability in the membranes was primarily governed by gas solubility rather than diffusivity. Modifying Pebax membrane with PAMAM improved separation performance with minimal aging and good stability.
Article
Engineering, Environmental
N. Fajrina, N. Yusof, A. F. Ismail, J. Jaafar, F. Aziz, W. N. W. Salleh, N. A. H. M. Nordin
Summary: The study developed a composite membrane substrate for CO2/CH4 separation by incorporating LDH into PSf polymer, which increased CO2 permeance by 55-113% with potential for large-scale CO2 capture and separation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Yulong Liu, Run Long, Wei-Hai Fang, Oleg V. Prezhdo
Summary: This study demonstrates that nuclear quantum effects have a strong influence on the geometry and electron-vibrational dynamics of hybrid organic-inorganic perovskites. It leads to an extension of nonradiative carrier lifetimes, a decrease in the fundamental band gap, and an enhancement of electron-vibrational interactions. This provides important insights for the design of HOIPs and related materials for optoelectronic applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Xinyi Wang, Trevor J. Wilson, Christopher R. Maroon, Jeffrey A. Laub, Savannah E. Rheingold, Konstantinos D. Vogiatzis, Brian K. Long
Summary: Natural gas production and utilization have increased significantly in recent years, necessitating improved methods for purification. This study focuses on the development of polymeric materials for natural gas purification and demonstrates that incorporating fluoroalkoxysilyl substituents can enhance CO2/CH4 permselectivity. The findings suggest that the observed increase in selectivity is primarily due to improved CO2 sorption in the fluorine-containing polymers.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Chemical
Yang Liu, Zhongyun Liu, Brian E. Kraftschik, Vinod P. Babu, Nitesh Bhuwania, Daniel Chinn, William J. Koros
Summary: Raw natural gas contains impurities like H2S and CO2 which can be corrosive, but TEGMC hollow fiber membranes show efficient removal. The presence of hydrocarbons in the feed gas enhances selectivity, and competitive sorption could be a useful tool in tuning membrane performance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Eduardo Perez-Botella, Miguel Palomino, Gabriel B. Bafero, Heloise O. Pastore, Susana Valencia, Fernando Rey
Summary: The influence of framework topology on the separation of carbon dioxide from methane was studied in small pore pure silica zeolites with various structures. Pure silica materials were used to isolate the effect of framework topology. The results showed that materials with channel-like topology exhibited higher selectivity towards CO2 due to kinetic exclusion of methane. Si-ITW showed promising performance in CO2 separation, with high selectivity, diffusion rates, and moderate maximum capacity. It also had advantages over traditional zeolites in terms of energy requirements for regeneration and hydrophobicity.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Engineering, Chemical
Mohammad Amin Alaei Shahmirzadi, Ali Kargari, Takeshi Matsuura
Summary: Novel organic/inorganic hybrid ionogels with high ionic liquid (IL) loading were synthesized using a one-pot sol-gel method, which exhibited desirable properties and showed promising potential for propylene/propane separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Dan Lai, Fuqiang Chen, Lidong Guo, Lihang Chen, Jie Chen, Qiwei Yang, Zhiguo Zhang, Yiwen Yang, Qilong Ren, Zongbi Bao
Summary: A guest solvent-directed strategy was employed to fine-tune the pore size and achieve highly efficient kinetic separation. The constructed metal-organic frameworks showed excellent separation performance, with a periodically expanding and contracting aperture that effectively trapped CO2 and hindered the diffusion of CH4, resulting in ultrahigh kinetic selectivity and equilibrium-kinetic combined selectivity.
Article
Chemistry, Physical
Ayako Iino, Atsushi Takagaki, Ryuji Kikuchi, S. Ted Oyama, Kyoko K. Bando
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Physical
Vibin Vargheese, I. Tyrone Ghampson, Gwang-Nam Yun, Yasukazu Kobayashi, Atsushi Takagaki, S. Ted Oyama
APPLIED CATALYSIS A-GENERAL
(2020)
Article
Chemistry, Physical
Vibin Vargheese, Junichi Murakami, Kyoko K. Bando, I. Tyrone Ghampson, Gwang-Nam Yun, Yasukazu Kobayashi, S. Ted Oyama
JOURNAL OF CATALYSIS
(2020)
Article
Chemistry, Multidisciplinary
Vibin Vargheese, Yasukazu Kobayashi, S. Ted Oyama
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Applied
Lei Wang, Haiyan Liu, Yu Fan, Pei Yuan, Deqi Huang, S. Ted Oyama, Tinghai Wang, Xiaojun Bao
Summary: This study demonstrates a novel approach of tuning crystal facet engineering on γ-Al2O3 to expose new facets for improved catalytic performance. By selectively depositing and sulfiding metal oxides NiOx and MoOx on the respective facets, a NiS2-MoS2/Al2O3 catalyst is formed with substantially enhanced activity for thio-etherification reaction. The cooperative catalysis from the newly exposed facets shows superior activity over conventional catalysts, highlighting the potential for rational design of high performance catalysts.
Article
Engineering, Chemical
Gwang-Nam Yun, I. Tyrone Ghampson, William J. Movick, Vibin Vargheese, Yasukazu Kobayashi, S. Ted Oyama
CHEMICAL ENGINEERING SCIENCE
(2020)
Article
Chemistry, Physical
S. Ted Oyama, Gwang-Nam Yun, So-Jin Ahn, Kyoko K. Bando, Atsushi Takagaki, Ryuji Kikuchi
Summary: This study presents a general method for analyzing whether an adsorbed species is a reactive intermediate in hydrogenation or oxidation reactions, providing order-of magnitude estimates of the rate of reaction. The example of hydrodeoxygenation of gamma-valerolactone using a Ni2P/MCM-41 catalyst demonstrates the application of in situ infrared and X-ray absorption spectroscopy to characterize reaction intermediates.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
I. Tyrone Ghampson, Gwang-Nam Yun, Arisa Kaneko, Vibin Vargheese, Kyoko K. Bando, Tetsuya Shishido, S. Ted Oyama
Summary: The catalytic partial oxidation of methane to dimethyl ether (DME) was studied using different catalysts and reactant conditions. The choice of catalyst support and oxidants had a significant impact on the selectivity and catalytic activity of the reaction.
Article
Biochemistry & Molecular Biology
Sean-Thomas B. Lundin, Hongsheng Wang, S. Ted Oyama
Summary: Composite membranes consisting of microporous tantalum-doped silica layers were fabricated using chemical vapor deposition. The selectivity of the membranes could be adjusted by varying the deposition temperature and the tantalum content. However, increasing tantalum content resulted in decreased hydrothermal stability.
Article
Chemistry, Physical
I. Tyrone Ghampson, Sean-Thomas B. Lundin, Tetsuya Shishido, S. Ted Oyama
Summary: The direct partial oxidation of CH4 to dimethyl ether (DME) was achieved using a Pt/Y2O3 catalyst with a mixture of NO and O-2, where the NO/NO2 mixture acted as a single oxygen atom shuttle, with no decomposition or net consumption of these species.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Electrochemistry
Tomohiro Mishina, Naoya Fujiwara, Shohei Tada, Atsushi Takagaki, Ryuji Kikuchi, Shigeo Ted Oyama
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Yusuke Honda, Naoya Fujiwara, Shohei Tada, Yasukazu Kobayashi, Shigeo Ted Oyama, Ryuji Kikuchi
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Huidong Zheng, Donglin Li, Jingjing Chen, Jie Liu, Zuoyi Yan, S. Ted Oyama
REACTION CHEMISTRY & ENGINEERING
(2020)
Article
Biochemistry & Molecular Biology
Harumi Kato, Sean-Thomas B. Lundin, So-Jin Ahn, Atsushi Takagaki, Ryuji Kikuchi, S. Ted Oyama
Article
Biochemistry & Molecular Biology
S. Ted Oyama, Haruki Aono, Atsushi Takagaki, Ryuji Kikuchi, Takashi Sugawara
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)